Unit shows E7 and will not start; sometimes occurs after tilting or transporting the machine.

Safety first: Ensure the unit is on a flat, stable surface before troubleshooting.

• Reset position: Place the carpet cleaner upright on a level floor. Turn it off, unplug for 1–2 minutes, then plug back in and power on.
• Check for obstructions: Make sure the handle is fully locked into the operating position and not partially folded.
• Inspect tilt sensor (advanced): With the unit unplugged, open the housing and locate the tilt or position sensor (often a small module near the handle pivot). Ensure it is securely mounted and the connector is firmly attached.
• Check wiring harness: Follow the harness from the tilt sensor to the PCB, looking for pinched or broken wires.
• Replace sensor if faulty: If the sensor rattles, is physically damaged, or tests open/shorted per service specs, replace it.

If E7 continues after these steps, the main PCB may require replacement or firmware reset by an authorized service center.